450  
FNCA52 TJSJ 140918  
FWFSJU  
 
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO  
NATIONAL WEATHER SERVICE SAN JUAN PR  
518 AM AST TUE OCT 14 2025  
   
DISCUSSION  
 
TODAY, SOUTHEASTERLY WINDS BETWEEN 8 - 12 MPH AND LOCALLY HIGHER  
AREAS ARE EXPECTED ACROSS THE ISLANDS. ADDITIONALLY, TEMEPRATURES  
SHOULD SLIGHTLY INCREASE, REMAINING ABOVE NORMAL. THE LATEST U.S.  
DROUGHT MONITOR REPORT HIGHLIGHTS PORTIONS OF THE SOUTHERN COASTAL  
PLAINS OF PUERTO RICO DUE ABNORMALLY DRY SOILS. ADDITIONALLY,  
STATIONS IN CABO ROJO AND GUANICA REPORTED KDBI VALUES SLIGHTLY  
ABOVE THRESHOLDS (584 AND 570 RESPECTIVELY). ALTHOUGH THIS AREA  
MAY EXPECT HIGHER WINDS (BETWEEN 12 - 16 MPH) AND GUSTS UP TO 20  
MPH, MINIMUM RELATIVE HUMIDITIES SHOULD REMAIN ABOVE THRESHOLDS  
(57 - 59 %). ADDITIONALLY, PASSING SHOWERS MOVED DURING THE NIGHT  
HOURS ACROSS THESE AREAS DUE TO A PERTURBATION IN THE TRADES.  
GIVEN THE CURRENT CONDITIONS AND THE EXPECTED WEATHER FORECAST,  
THE FIRE DANGER THREAT SHOULD REMAIN LOW TODAY.  
 
PRZ014-150930-  
SOUTHEAST COASTAL PLAINS-  
518 AM AST TUE OCT 14 2025  
 
TODAY TONIGHT WED  
 
CLOUD COVER MCLEAR PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 10 40 20  
TEMP (24H TREND) 91 (+1) 73 (-3) 91  
RH % (24H TREND) 59 (-3) 94 (+2) 61  
WIND 20FT/EARLY(MPH) SE 12 E 9 S 8  
WIND 20FT/LATE(MPH) SE 12 E 9 S 8  
MIXING HGT(FT-AGL/MSL)4650 4400  
TRANSPORT WND (MPH) E 13 S 7  
VENT RATE (KT-FT) 51150 26400  
DISPERSION 5 5  
DSI 5 2 5  
RH RECOVERY EXCELLENT  
 
REMARKS...NONE.  
 
 
 
PRZ015-150930-  
SOUTHERN HILLS-  
518 AM AST TUE OCT 14 2025  
 
TODAY TONIGHT WED  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 20 30 20  
TEMP (24H TREND) 88 (+3) 70 (-3) 87  
RH % (24H TREND) 62 (-2) 98 (+5) 62  
WIND 20FT/EARLY(MPH) SE 10 E 6 S 10  
WIND 20FT/LATE(MPH) SE 10 E 6 S 10  
MIXING HGT(FT-AGL/MSL)5220 5050  
TRANSPORT WND (MPH) E 12 S 8  
VENT RATE (KT-FT) 52200 35350  
DISPERSION 5 5  
DSI 5 2 5  
RH RECOVERY EXCELLENT  
 
REMARKS...NONE.  
 
 
 
PRZ016-150930-  
NORTH COASTAL PLAINS-  
518 AM AST TUE OCT 14 2025  
 
TODAY TONIGHT WED  
 
CLOUD COVER PCLDY MCLEAR PCLDY  
PRECIP TYPE TSTMS SHOWERS TSTMS  
CHANCE PRECIP (%) 40 0 80  
TEMP (24H TREND) 91 (+1) 73 (-3) 92  
RH % (24H TREND) 60 (-4) 98 (+4) 58  
WIND 20FT/EARLY(MPH) E 13 SE 10 NW 13  
WIND 20FT/LATE(MPH) E 13 SE 10 NW 13  
MIXING HGT(FT-AGL/MSL)4890 4870  
TRANSPORT WND (MPH) E 12 S 7  
VENT RATE (KT-FT) 48900 29220  
DISPERSION 5 5  
DSI 6 3 5  
RH RECOVERY EXCELLENT  
 
REMARKS...NONE.  
 
 
 
PRZ017-150930-  
NORTHERN HILLS-  
518 AM AST TUE OCT 14 2025  
 
TODAY TONIGHT WED  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE TSTMS SHOWERS TSTMS  
CHANCE PRECIP (%) 60 40 90  
TEMP (24H TREND) 89 (+1) 70 (-3) 90  
RH % (24H TREND) 63 (-1) 98 (+2) 60  
WIND 20FT/EARLY(MPH) E 10 SE 9 W 11  
WIND 20FT/LATE(MPH) E 10 SE 9 W 11  
MIXING HGT(FT-AGL/MSL)5290 5130  
TRANSPORT WND (MPH) SE 9 S 7  
VENT RATE (KT-FT) 42320 30780  
DISPERSION 5 5  
DSI 6 2 5  
RH RECOVERY EXCELLENT  
 
REMARKS...NONE.  
 
 
 
PRZ018-150930-  
WEST COAST-  
518 AM AST TUE OCT 14 2025  
 
TODAY TONIGHT WED  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE TSTMS TSTMS SHOWERS  
CHANCE PRECIP (%) 60 40 40  
TEMP (24H TREND) 92 (+1) 72 (-2) 91  
RH % (24H TREND) 61 (-1) 98 (+2) 63  
WIND 20FT/EARLY(MPH) E 11 E 8 S 13  
WIND 20FT/LATE(MPH) E 11 E 8 S 13  
MIXING HGT(FT-AGL/MSL)4610 4730  
TRANSPORT WND (MPH) SE 10 S 13  
VENT RATE (KT-FT) 41490 52030  
DISPERSION 5 5  
DSI 5 3 6  
RH RECOVERY EXCELLENT  
 
REMARKS...NONE.  
 
 
 
PRZ019-150930-  
EASTERN INTERIOR-  
518 AM AST TUE OCT 14 2025  
 
TODAY TONIGHT WED  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS TSTMS  
CHANCE PRECIP (%) 30 20 50  
TEMP (24H TREND) 90 (+3) 70 (-4) 90  
RH % (24H TREND) 61 (-4) 99 (+2) 60  
WIND 20FT/EARLY(MPH) SE 10 SE 8 SW 9  
WIND 20FT/LATE(MPH) SE 10 SE 8 SW 9  
MIXING HGT(FT-AGL/MSL)5450 5490  
TRANSPORT WND (MPH) SE 12 S 9  
VENT RATE (KT-FT) 54500 43920  
DISPERSION 5 5  
DSI 5 2 5  
RH RECOVERY EXCELLENT  
 
REMARKS...NONE.  
 
 
 
PRZ022-150930-  
LUQUILLO MOUNTAIN RANGE-  
518 AM AST TUE OCT 14 2025  
 
TODAY TONIGHT WED  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 40 30 40  
TEMP (24H TREND) 86 (+5) 69 (-4) 86  
RH % (24H TREND) 66 (-6) 100 (+1) 65  
WIND 20FT/EARLY(MPH) SE 10 SE 6 S 8  
WIND 20FT/LATE(MPH) SE 10 SE 6 S 8  
MIXING HGT(FT-AGL/MSL)4470 4230  
TRANSPORT WND (MPH) SE 12 S 10  
VENT RATE (KT-FT) 44700 38070  
DISPERSION 5 5  
DSI 6 2 5  
RH RECOVERY EXCELLENT  
 
REMARKS...NONE.  
 
 
 
PRZ023-150930-  
CENTRAL MOUNTAIN RANGE-  
518 AM AST TUE OCT 14 2025  
 
TODAY TONIGHT WED  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE TSTMS TSTMS TSTMS  
CHANCE PRECIP (%) 60 50 50  
TEMP (24H TREND) 87 (+4) 68 (-3) 87  
RH % (24H TREND) 63 (-2) 98 (+2) 63  
WIND 20FT/EARLY(MPH) SE 8 SE 6 S 12  
WIND 20FT/LATE(MPH) SE 8 SE 6 S 12  
MIXING HGT(FT-AGL/MSL)5750 5530  
TRANSPORT WND (MPH) E 9 S 8  
VENT RATE (KT-FT) 46000 38710  
DISPERSION 5 5  
DSI 5 1 5  
RH RECOVERY EXCELLENT  
 
REMARKS...NONE.  
 
 
 
PRZ024-150930-  
CAYEY MOUNTAIN RANGE-  
518 AM AST TUE OCT 14 2025  
 
TODAY TONIGHT WED  
 
CLOUD COVER MCLEAR PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 20 40 30  
TEMP (24H TREND) 85 (+2) 69 (-3) 85  
RH % (24H TREND) 67 (-2) 100 (+1) 66  
WIND 20FT/EARLY(MPH) SE 9 E 5 S 8  
WIND 20FT/LATE(MPH) SE 9 E 5 S 8  
MIXING HGT(FT-AGL/MSL)4830 4810  
TRANSPORT WND (MPH) E 12 S 9  
VENT RATE (KT-FT) 48300 38480  
DISPERSION 5 5  
DSI 6 1 5  
RH RECOVERY EXCELLENT  
 
REMARKS...NONE.  
 
 
 
PRZ025-150930-  
VIEQUES-  
518 AM AST TUE OCT 14 2025  
 
TODAY TONIGHT WED  
 
CLOUD COVER PCLDY PCLDY MCLEAR  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 20 30 10  
TEMP (24H TREND) 90 (+1) 75 (-2) 89  
RH % (24H TREND) 60 (-2) 92 (-4) 59  
WIND 20FT/EARLY(MPH) E 11 E 10 S 10  
WIND 20FT/LATE(MPH) E 11 E 10 S 10  
MIXING HGT(FT-AGL/MSL)3490 3340  
TRANSPORT WND (MPH) E 15 S 12  
VENT RATE (KT-FT) 45370 33400  
DISPERSION 5 5  
DSI 6 6 6  
RH RECOVERY EXCELLENT  
 
REMARKS...NONE.  
 
 
 
PRZ026-150930-  
CULEBRA-  
518 AM AST TUE OCT 14 2025  
 
TODAY TONIGHT WED  
 
CLOUD COVER PCLDY PCLDY MCLEAR  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 20 20 20  
TEMP (24H TREND) 92 (+2) 77 (-2) 92  
RH % (24H TREND) 57 (-7) 92 (0) 57  
WIND 20FT/EARLY(MPH) E 11 E 10 S 11  
WIND 20FT/LATE(MPH) E 11 E 10 S 11  
MIXING HGT(FT-AGL/MSL)3390 3390  
TRANSPORT WND (MPH) E 14 S 13  
VENT RATE (KT-FT) 40680 37290  
DISPERSION 5 5  
DSI 6 6 6  
RH RECOVERY EXCELLENT  
 
REMARKS...NONE.  
 
 
 
PRZ027-150930-  
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-  
518 AM AST TUE OCT 14 2025  
 
TODAY TONIGHT WED  
 
CLOUD COVER MCLEAR PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 20 40 40  
TEMP (24H TREND) 93 (+2) 74 (-2) 92  
RH % (24H TREND) 57 (-2) 94 (+6) 58  
WIND 20FT/EARLY(MPH) SE 16 G20 E 10 S 12  
WIND 20FT/LATE(MPH) SE 16 G20 E 10 S 12  
MIXING HGT(FT-AGL/MSL)4930 4770  
TRANSPORT WND (MPH) SE 15 SE 10  
VENT RATE (KT-FT) 64090 42930  
DISPERSION 5 5  
DSI 5 4 5  
RH RECOVERY EXCELLENT  
 
REMARKS...NONE.  
 
 
 
VIZ001-150930-  
SAINT THOMAS AND SAINT JOHN-  
518 AM AST TUE OCT 14 2025  
 
TODAY TONIGHT WED  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 20 30 40  
TEMP (24H TREND) 87 (+1) 75 (-4) 87  
RH % (24H TREND) 63 (-5) 97 (+4) 64  
WIND 20FT/EARLY(MPH) E 11 E 10 S 10  
WIND 20FT/LATE(MPH) E 11 E 10 S 10  
MIXING HGT(FT-AGL/MSL)3420 3300  
TRANSPORT WND (MPH) E 16 S 12  
VENT RATE (KT-FT) 47880 33000  
DISPERSION 5 5  
DSI 6 6 6  
RH RECOVERY EXCELLENT  
 
REMARKS...NONE.  
 
 
 
VIZ002-150930-  
ST CROIX-  
518 AM AST TUE OCT 14 2025  
 
TODAY TONIGHT WED  
 
CLOUD COVER MCLEAR PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 10 30 30  
TEMP (24H TREND) 89 (+1) 75 (-3) 90  
RH % (24H TREND) 63 (-4) 94 (+1) 63  
WIND 20FT/EARLY(MPH) E 11 E 9 S 9  
WIND 20FT/LATE(MPH) E 11 E 9 S 9  
MIXING HGT(FT-AGL/MSL)4240 4190  
TRANSPORT WND (MPH) E 14 S 10  
VENT RATE (KT-FT) 50880 37710  
DISPERSION 5 5  
DSI 6 5 6  
RH RECOVERY EXCELLENT  
 
REMARKS...NONE.  
 
 
 
 
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